A Study of the Rotational Motion of Water Molecules absorbed on the Clay

Nuciear magnetic study on absorbed water of soils (VI)

Abstract

The rotational motion of water molecules absorbed on the clay was investigated. According to experimental second moments calculated by the N. M. R. spectra of the proton, the motion depended on ω°. On investigating the values and changes in the pattern of the motion for angle ω, it was concluded that the proton-proton vector in the water molecu, les rotated about an axis of 45° with the clay platelets (Fig. 1).
Based on our results, it is our assumption that the proton-proton vector rotated about an axis of 45° with the clay platelets in the solid state. The theoretical second moments in the rotational motion were calculated. The theoretical values agree well with the experimental results (Figs. 6, 7, 8).
As shown in Fig. 15, it is clear that the angle β_{n, jk} of the rotational motion decreases with the temperature.